Roger Lee Williams is a British structural biologist who is group leader at the Medical Research Council (MRC) Laboratory of Molecular Biology.

His group studies the form and flexibility of protein complexes that associate with and modify lipid cell membranes.

[6] The work of Williams group is deciphering mechanisms of activation and inhibition of diverse members of the phosphoinositide 3-kinase (PI3K) enzyme[7] a family of enzymes involved in cell-cell communication, lysosomal sorting, nutrient sensing, cell proliferation and DNA-damage response.

[2] Williams is a member of European Molecular Biology Organization and Fellow of the Academy of Medical Sciences (FMedSci).

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